How do I use substitution to find the ordered pair between these two equations? : 1x+1y+15=22
2x+3y+5=22

x=4, y=3 (4,3)

Step-by-step explanation:

- x=7−y

19+y=22

y=3

-Substitute y=3y=3 into x=7-yx=7−y.

x=4

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540